An Etymological Dictionary of Astronomy and Astrophysics

1. A person who is active in party politics.
   

2. A person who holds a political office.
   

3. A person skilled in political government or administration; statesman or stateswoman (Dictionary.com).

Etymology (EN): From politic + -ian an agent noun suffix.

Etymology (PE): Kârâhigar, from kârâhi-, contraction of kârâhik, → politics, because of the k-g succession, + -gar, → -or.